THE THIRD WELL HAD NOT BEEN LEAKING AND DID NOT CATCH FIRE BUT SECURED SATURDAY ASSIST A PRECAUTION. WELL-KNOWN PITTSBURGH BUILDING IS CHANGING HANDS TONIGHT. THE OLD UNION TRUST BUILDING WAS SOLD AT SHERIFF'S SALE TODAY FOR $14 MILLION. A BOSTON DEVELOPER BOUGHT THE BUILDING AND EXPLORING USES, INCLUDING TURNING IT INTO OFFICES, RETAIL SPACE, MAYBE EVEN BUILDING A HOTEL THERE.